Resonant third-order optical nonlinearity of the neutral and the dication molecules of a triphenodithiazine model compound

Jacek Swiatkiewicz; Maciek E. Orczyk; Paras N. Prasad; Charles W. Spangler; Mingqian He

doi:10.1117/12.165277

16 December 1993 Resonant third-order optical nonlinearity of the neutral and the dication molecules of a triphenodithiazine model compound

Jacek Swiatkiewicz, Maciek E. Orczyk, Paras N. Prasad, Charles W. Spangler, Mingqian He

Author Affiliations +

Proceedings Volume 2025, Nonlinear Optical Properties of Organic Materials VI; (1993) https://doi.org/10.1117/12.165277
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Third order nonlinear optical susceptibility of solutions of a triphenodithiazine derivative in dichloromethane has been measured at several different wavelengths utilizing sub-picosecond degenerate four-wave mixing. The values of the second hyperpolarizability, (gamma) , for the neutral and for the oxidized form (dication) are reported. The measurements performed at the wavelengths corresponding to the absorption maxima of the neutral and the dication forms (578 nm and 800 nm, respectively) indicate a twofold increase of the (gamma) /(sigma) figure of merit (where (sigma) is the absorption cross section) for the dication molecule. Time resolved experiments reveal different dynamics of photoexcitation relaxation in the neutral and the oxidized molecules.

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Jacek Swiatkiewicz, Maciek E. Orczyk, Paras N. Prasad, Charles W. Spangler, and Mingqian He "Resonant third-order optical nonlinearity of the neutral and the dication molecules of a triphenodithiazine model compound", Proc. SPIE 2025, Nonlinear Optical Properties of Organic Materials VI, (16 December 1993); https://doi.org/10.1117/12.165277

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